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The EF-hand domain: A globally cooperative structural unit

Nelson, MR; Thulin, Eva LU ; Fagan, PA; Forsén, Sture LU and Chazin, WJ (2002) In Protein Science 11(2). p.198-205
Abstract
EF-hand Ca2+-binding proteins participate in both modulation of Ca2+ signals and direct transduction of the ionic signal into downstream biochemical events. The range of biochemical. functions of these proteins is correlated with differences in the way in which they respond to the binding of Ca2+. The EF-hand domains of calbindin D-9k and calmodulin are homologous, yet they respond to the binding of calcium ions in a drastically different manner. A series of comparative analyses of their structures enabled the development of hypotheses about which residues in these proteins control the calcium-induced changes in conformation. To test our understanding of the relationship between protein sequence and structure, we specifically designed the... (More)
EF-hand Ca2+-binding proteins participate in both modulation of Ca2+ signals and direct transduction of the ionic signal into downstream biochemical events. The range of biochemical. functions of these proteins is correlated with differences in the way in which they respond to the binding of Ca2+. The EF-hand domains of calbindin D-9k and calmodulin are homologous, yet they respond to the binding of calcium ions in a drastically different manner. A series of comparative analyses of their structures enabled the development of hypotheses about which residues in these proteins control the calcium-induced changes in conformation. To test our understanding of the relationship between protein sequence and structure, we specifically designed the F36G mutation of the EF-hand protein calbindin D-9k to alter the packing of helices I and II in the apoprotein. The three-dimensional structure of apo F36G was determined in solution by nuclear magnetic resonance spectroscopy and showed that the design was successful. Surprisingly, significant structural perturbations also were found to extend far from the site of mutation. The observation of such long-range effects provides clear evidence that four-helix EF-hand domains should be treated as a single globally cooperative unit. A hypothetical mechanism for how the long-range effects are transmitted is described. Our results support the concept of energetic and structural coupling of the key residues that are crucial for a protein's fold and function. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
NMR spectroscopy, mutagenesis, EF-hand, calcium-binding protein, conformational change, protein engineering
in
Protein Science
volume
11
issue
2
pages
198 - 205
publisher
The Protein Society
external identifiers
  • pmid:11790829
  • wos:000173352700002
  • scopus:0036149479
ISSN
1469-896X
DOI
10.1110/ps.33302
language
English
LU publication?
yes
id
73e4c80e-7084-4f5e-9e8d-98822463911e (old id 344331)
date added to LUP
2007-11-16 16:24:28
date last changed
2017-08-27 04:08:17
@article{73e4c80e-7084-4f5e-9e8d-98822463911e,
  abstract     = {EF-hand Ca2+-binding proteins participate in both modulation of Ca2+ signals and direct transduction of the ionic signal into downstream biochemical events. The range of biochemical. functions of these proteins is correlated with differences in the way in which they respond to the binding of Ca2+. The EF-hand domains of calbindin D-9k and calmodulin are homologous, yet they respond to the binding of calcium ions in a drastically different manner. A series of comparative analyses of their structures enabled the development of hypotheses about which residues in these proteins control the calcium-induced changes in conformation. To test our understanding of the relationship between protein sequence and structure, we specifically designed the F36G mutation of the EF-hand protein calbindin D-9k to alter the packing of helices I and II in the apoprotein. The three-dimensional structure of apo F36G was determined in solution by nuclear magnetic resonance spectroscopy and showed that the design was successful. Surprisingly, significant structural perturbations also were found to extend far from the site of mutation. The observation of such long-range effects provides clear evidence that four-helix EF-hand domains should be treated as a single globally cooperative unit. A hypothetical mechanism for how the long-range effects are transmitted is described. Our results support the concept of energetic and structural coupling of the key residues that are crucial for a protein's fold and function.},
  author       = {Nelson, MR and Thulin, Eva and Fagan, PA and Forsén, Sture and Chazin, WJ},
  issn         = {1469-896X},
  keyword      = {NMR spectroscopy,mutagenesis,EF-hand,calcium-binding protein,conformational change,protein engineering},
  language     = {eng},
  number       = {2},
  pages        = {198--205},
  publisher    = {The Protein Society},
  series       = {Protein Science},
  title        = {The EF-hand domain: A globally cooperative structural unit},
  url          = {http://dx.doi.org/10.1110/ps.33302},
  volume       = {11},
  year         = {2002},
}